Direct lift command blending

Details Direct lift command blending Direct lift command blending

1984-05-29

1986-10-14

Krass, Errol A.

Boots, shoes, and leggings

244181, 318584, B64C 1500

Patent

active

046176330

ABSTRACT:
The rapid and precise control of an aircraft flight path is obtained by a continuous blending of direct lift and conventional longitudinal control system commands by a unit that consists of a combination of a linear gradient and breakout element, a blending integrator, a nonlinear element, a Direct Lift Limit element, an interconnect gain element, and three summing junctions. Direct lift is blended with conventional control as the pilot manual command is conditioned by the linear gradient and breakout element to provide the command signal to the first summing junction. The difference between this command and the output of the blending integrator is applied to the recentering nonlinear element. The direct lift command is obtained by passing the output of the recentering nonlinear element through the direct lift limit element. The second summing junction is used to reform the total system command which is applied to the third summing junction. The conventional longitudinal command is the output of the third summing junction; this output being the difference between the total system command and the direct lift command as modified by the interconnect gain.

REFERENCES:
patent: 3945593 (1976-03-01), Schanzer
patent: 4093158 (1978-06-01), Clews et al.
patent: 4093159 (1978-06-01), Gilson
patent: 4261537 (1981-04-01), Tisdale et al.
patent: 4326253 (1982-04-01), Cooper et al.

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